Vertical camera movement?

I have an overhead shot I need to do that may call for the camera to move up/out vertically. Is there a simpler method than using a dolly to compensate for horizontal movement in the arc of a jib arm?

I've seen the effect achieved lightweight by suspending the RED+Movi from a makeshift rope pulley system - but we're going to be shooting exterior with a 35mm camera, so that's not such a viable option...